+ Apartment Therapy asks the question Can an iPhone app green your life? The app provides green tips according to criteria you set, and spits out precise equations for how each change, if implemented, will reduce your water, energy, and carbon footprint.

+ The Huffington Post reports on water footprints; and, of course, lively debate ensues.

+ Earth2Tech snaps photos of Japan’s first drive-through battery swap for electric vehicles.

+ Inhabitat turns us on to Xerox’s new printer ink, which can cut waste by 90 percent (but costs $24K?!).

+ Industrial designer Ariel Roja’s toilet design uses gray water from the sink to flush the toilet, conserving 83% more water than a standard toilet.

+ MUJI’s collapsible cardboard speakers are lightweight and portable, and much sexier than standard plastic ones.

+ Noon Solar bags use paper thin solar panels to charge an internal battery, which means you can charge your laptop, cell phone, iPod, or other electronic accessory while it’s inside—and not use any energy in the process.

+ Eizo Nanao just announced their EcoView Sense computer monitor, which goes into sleep mode after 40 seconds if no one is sitting in front of the computer. The monitors also use a light sensor that adjusts screen brightness based on the light in the room.